nope not true at all, A4 is a morph set for V4 so as long as the V4 clothing has A4 morphs you can go between them quite easily(as far as I know there is no clothing for A4 that isnt at base V4 clothing, that just wouldnt make sense). as far as facial morphs V4 morphs will work on A4 but due to the fact that its adding one morph ontop of another you have to be careful how high you set the other morphs before you get distortion.